HEFTING, P. H. Notities over G. H. Breitner . The Rijksmuseum Bulletin, [S. l.], v. 16, n. 4, p. 164–173, 1968. DOI: 10.52476/trb.21152. Disponível em: https://bulletin.rijksmuseum.nl/article/view/21152.. Acesso em: 5 feb. 2025.